Julia has 2 identical rooms in her house. if each room measures 8 feet on one side and 12 feet on another, what is the total are
1 answer:
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we are given
now, we can factor out right side term
now, we can plug back
and we get
so,
.............Answer
Answer: 0.0775
Step-by-step explanation:
Given : Mean :
Standard deviation :
Sample size :
Since its normal distribution , then the formula to calculate the z-score is given by :-
For x= 28.2 hours
For x= 30 hours
The P- value =
Hence, the probabiliy that the average time spent stydying for the sampe was between 28.2 and 30 hours = 0.0775